In an effort to determine differences in the oxidative stability
between cooked samples formulated with and without encapsulated phosphates, encapsulation significantly enhanced the oxidative stability of cooked samples during storage period (p< 0.05).
The highest oxidative stabilitywas accomplished in the samples contained eSTP and eSPP (p< 0.05) followed by uSTP and uSPP. However, there were no observable differences between 30% and 50% coating levels as far as TBARS were concerned. The highest TBARS values were determined in control samples on days 1 and 7 (p< 0.05).
The reduction of TBARS by encapsulation may be due to the higher level of non-hydrolyzed phosphate after cooking.
An increase in phosphate concentration decreases the level of
enzymatic activity by the chelation of metals (McComb et al.,1979).
Decker and Mei (1996) reported that the addition of STP to meat after cooking resulted in significant improvement in controlling oxidation during storage.
However, the post-cooking addition of STP is impractical
to the industry due to production inefficiencies and food safety issues.
Therefore encapsulation is a better approach to achieve a desirable antioxidanteffect from phosphates.